Replaced parts and Whirlpool dishwasher still not maintaining hot water or drying dishes

I have a built in model WDT770PAYM0 Whirlpool dishwasher which is not maintaining hot or even warm water for washing the dishes. It is also not drying the dishes during the drying cycle. Additionally, I'm not sure the correct water fill level for this dishwasher but it seems to be lower than it should be (at least 1 inch below heating element). I have already replaced the heating element, thermostat and water inlet valve but it is still not maintaining water temp or drying the dishes. Please help.